Muffler



Feb. 13, 1940. R. L. BROOKS MUFFLER Filed March 24, 1939 flay Z. 3700 K5INVENTOR ATTORNEYS Patented Feb. 13, 1940 UNITED STATES PATENT OFFICEApplication'March 24,

3 Claims.

The invention relates to a mufiler and more especially to an exhaustsilencer for use on internal combustion engines, Diesel or other motors.5 The primary object of the invention is the provision of a mulller orsilencer of this character, wherein the same when in use is devoid ofobstruction for causing back pressure such as ordinary mufile-rs haveand exhaust gases pass out freely but when. the air rushes back it isinterrupted and effects a vacuum so as to pocket the air whenrushing'back and in this way deadening the sound or noises which wouldotherwise result and at the same time assures proper motor performanceswith resultant increase in power and saving of fuel as well asminimizing valve trouble.

Another object of the invention is the provision of a muiller orsilencer of this character, wherein the same can be readily disassembledso that it may be conveniently cleaned when the occasion requires andwill eliminate back pressure in motors.

A further object of the invention is the provision of a mufiler orsilencer of this character, wherein the construction thereof is novel inits entirety and the exhaust of an internal combustion engine or thelike is operated upon when delivered from the combustion chamber at theend of the power stroke and the noise or sound incident thereto will benullified.

A still further object of the invention is the provision of a mufller orsilencer of this character, which is simple in construction, thoroughlyreliable and efiicient in operation, strong, durable,

and inexpensive to manufacture and install.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawing, which discloses the preferred embodiment of the invention andpointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation, partly broken away, of a muflier orsilencer constructed in accordance with the invention.

Figure 2 is a fragmentary vertical longitudinal sectional view throughthe muffler or silencer.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2 lookingin the direction of the arrows.

Figure 4 is a perspective view of one of the funnel units of the muifleror silencer.

Similar reference characters indicate corre- 1939, Serial No. 264,020

(Cl. ISL-48) sponding parts throughout the several views in the drawing.

Referring to the drawing .in detail, A designates generally the niufileror silencer in its entirety as involving a silencer jacket or body 5,its opposite open ends being closed by nippled heads or disk-like endpieces 6, the nipples 1' being extended outwardly centrally thereof forinlet and outlet communication and one of these nipples is coupled withthe exhaust pipe of an internal combustion engine, a portion of theexhaust pipe being indicated at 8, while the other nipple i is coupledwith the discharge end of said exhaust pipe, a portion thereof beingindicated at 9. the pipe 8 being next to the exhaust manifold of theengine, these being not shown.

The heads or end pieces 6 are provided with peripheral annular seats 10for the end edges of the jacket 5 and passed through the said heads orend pieces are tie bolts H, which join the L jacket and heads or endpieces together, as is clearly shown in Figure 2 of the drawing.

Arranged interiorly of the jacket 5 are spaced centrally perforatedring-like baflies I2 separated from each other by spacer parts l3, eachof annular formation and of less diameter than the cross sectionaldiameter of the jacket 5. The baiiles l2 are slidably supported on thetie rods H interiorly of the jacket and have their center perforationsor openings M aligned with each other and with the exhaust pipe sections8 and 9, respectively, being of a size slightly greater than the crosssectional internal diameter of the said pipe sections.

Built upon or associated with the bailles l2 at the perforations oropenings 44 are truncated. funnels l5, these being disposed in the samedirection to each other and alternate funnels l5 concentricallyof thecenter openings 15 therein are provided with spaced apertures H. theheads or end pieces 6, that is, the one remote from the exhaustmanifold, is threaded set screws 1 8, these working against the bafflel2 next there to and in this manner the bafiies i2 with the funnels i5associated therewith and the spacer members l3 are held in a fixedassembly within the jacket 5 to avoid any displacement relative to eachother.

In the use of the mufiler or silencer constructed in accordance with theinvention hereinbefore set forth, there will be no obstruction toexhaust from the engine causing back pressure such as ordinarily existswith the conventional mufiles and the exhaust gases pass out freely fromthe said muiller but when air rushes back, it is interrupted In one ofby the funnels, being so arranged as to'pocket the air rushing back andin this manner deadens or nullifies noises or sound resulting in thesilencing of the exhaust from the engine. The air passing through theholes I! will be broken up and the funnels devoid of the perforations I!will block the air and in this Way back pressure is nullified and noisesor sounds minimized or eliminated.

What is claimed is:

1. A muffler comprising a cylindrical body, nippled endfheads atopposite ends thereof, tie rods passing through the cylindrical body andconnecting the said end heads, and a plurality of baflies fitting thetie rods and having funnels registering with each other, the funnels ofalternate baflies being perforated.

2. A muflier comprising a cylindrical body;

nippled end heads at opposite ends thereof, tierods passing through thecylindrical body and between the battles for the spacing thereofrelative to each other.

3.A mufiier comprising a cylindrical body, nippled end heads at oppositeends thereof, tie rods passing through the cylindrical body and connecting the said end heads, a plurality of baflies fitting the tie rodsand having perforated funnels registering with each other, the funnelsof alternate baffles being perforated spacers between the bafiles forthe spacing thereof relative to each other, and means engaged with oneend head and active upon a baflle adjacent thereto to hold the same intheir spaced assembled relation to each other.

ROY L. BROOKS.

